420 ROSACE AE 



_ 65. P. decurrens (S. Wats.) Rydb. Perennial; stems glabrous up to the 

 inflorescence, less than 1 dm. high, ascending; basal leaves pinnate, with 11-13 

 leaflets, which are broadly cimeate, usually 3-toothed at the apex, 1 cm. long or 

 less; cymes 4-10-flowered; sepals lanceolate, acute, 4-5 mm. long; petals obovate, 

 5 mm. long. P, disseda decurrens S. Wats. Mountains: Utah, Alp.—MonL 



66. p. wyomingensis A. Nels. Stems 1-2.5 dm. high, strigose, erect or 

 ascendmg; basal leaves crowded, pinnate, with 7-19 leaflets, white silky-strigose 

 wlien young sometimes glabrate in age; leaflets 1 cm. long or less, the upper 

 pmnatihd, the lower 3-5-fid, with linear or Unear-oblong divisions; sepals ovate- 

 lanceolate, acununate, 4-5 mm. long; petals broadly obovate, rctuse, 6-8 mm. 



long P momdensis A. Nels. Mountains: Wyo.— Mont.— Ida. Submont.— 

 Mont. Je-Jl. 



^v. ^'^i ?* °7^,* ^\ ^- ^^acoun. Stems mostly erect or ascending, usually less 

 than 1 dm high, strigose, with 2 or 3 reduced leaves, 3-6-flowered; basal leaves 

 crowded, 2-4 cm long, appressed-hoary, especially when yoimg, pinnate, with 

 7-11 crowded leaflets; leaflets deeply cleft into oblong obtuse lobes; sepals lance- 



acumm 



than the sepals. P. diversifolia pinnalisecta S. Wats. High mountains: Alta. 

 Wyo.— Utah. Submont.^Subalp. Je-Au. 



1 A K ^"^'^^ondii Lehm. Stem erect, 3-6 dm. high, slightly hairy, few- 

 leaved, branched above; basal leaves pinnate, hairy, especiallv when young; 

 leaflets 5-11, somewhat crowded, often verticiUate and the upper confluent 

 vemed 2-6 cm. long, obovate-cuneate, deeply and sharply serrate; sepals ovate- 



Ih^n t^ ' ^^T^^'^^t' ^' •™"'- 1°,^^' P^*^l^ 6-10 mm. long, obcordate, longer 

 th^m^ the sepals. Mountams: Alta.-B.C.-n Calif. -Ida. Submont. -Mont. 



f„,pw" f: ^K^^^^t ^' ^ m^^' M*^""^^ several, ascending, 2-3 dm. high, often dif- 

 SL ^^'■^''•H^' «i"^y-P^o«e; basal leaves many, pinnate, silky-viUous 

 the™',';,r^'1'"i !^?T?°^ *^^ ^^P^ «^ the leaflets), nearly glabrous on 

 it tKLv 1'"' ^f '^' ^^~^^' '-^PP^^^^ate, cuneate, 1.5-2 cm. long, toothed 

 «L„f 4^^^ generaUy remainmg conduphcate; sepals ovate-lanceolate, acute, 



DlacPs- Cnl^" jW'y'^'']^^ "^^tII^' i^^P'y '^^t^^*'' exceeding the calyx. Dry 

 places. Colo.— Utah— Ariz.— N.M. Submont. Jl-S. ° J J 



70. P. paucijuga Rydb. Stems about 2 dm. high, tinged with nurnle 



TTelletf- t'^e'^in" 1 ^f "fl^; r ^"S^^^ 1?^ decumbent; bafal leaves p^naterwith 

 5 leaflets, terminal leaflet broadly obovate, 2-2.5 cm. long, sessile ereeA but 



?he m?dHh"iL?r'' ^-l^t^tr^^*"^^ ?^.d '^^y beneath, diVided t;STrds to 

 smllW inTli 1 "i 7 ''b^"?^' f*^^*^^'^ divisions; lateral leaflets simUar, but 



emS.tP^ .hn ft r'""^^*^', ^'^*'\^ mm. long; petals yeflow, broadly obovate, 

 emargmate, about 6 mm. long. Mountains: se Utah. Subalp.—Alp. Jl. 



deci^mhP^t^^t'lnT"*^-^!?^^'*^-! ^*T^ "^^^^^1 ^^'^ the caudex, ascending or 

 aDZw.totiS.t?- h^gh, few-leaved, grayish silky; leaves pinAate, with 5-9 



Sea^h^^taflptf 1 -i f ^'T^ ''H ''' ^^'^t^ ^^^^^^ white-tomentose and silky 

 into W^r nht,L « T- l"""^' ''^?^^^ '^ ^^tline, divided to near the midrib 

 Detak obovatpTb r''''*'^^ ovate or ovate-lanceolate, 4-5 mm. long; 



fubmonL Jh^. ^quaUmg the sepals. Mountains: Wyo.-Colo.-Nev: 



silkv^;inon^H^j!!^?^ ?T^^- 1 ?t^°^' ^^^^^^1' ^"-^^^t or ascending, finely white 



Setl Z'set^nH -fi f ' ^,f ^^ ^t^^^^ ™.^>'' P'°"^t«' ^'iti 7-9 approximate 

 cm lone nSvVt.^n .S^ silky above, wh te-tomentose beneath; leaflets 2-4 

 h^ear mostlv oht L c^'' P^^^^^^^^f y divided to near the midril^ into ahnost 

 Ste truncnt^?hn,!f^"'™5r' ^^^^\ ^J^^e, 4-5 mm. long; petals obovate, 



virgulata 



lets obovate in outlme, 1-2 cm. long, green and sparindy aoDressed-silkv above. 



